Ballerio, A. The Ceratocanthinae of Madagascar and Comoro Islands: A Revision of the Genera Synarmostes and Goudotostes, and of the Flightless Philharmostes, With Description of 64 New Species (Coleoptera: Scarabaeoidea: Hybosoridae). Fragm entomol 2021, 53, 105-282.